Great ValueBy Emilioon 12/13/2011

This stuff works better than the name brand stuff my LFS sells and there's much more here! Now i want to but a reactor to run this GFO and the carbon.

Great ValueBy Emonton 12/13/2011

Emont would recommend this product to a friend

Works great. Much less expesive than the name brand stuff at the LFS and i think i works better.

Great StuffBy Randolphon 12/13/2011

Randolph would recommend this product to a friend

I got this product after seeing many people using it on youtube, so far so good, my phosphates are nice and low and it works great in my phosban reactor 150

amazingBy Raulon 12/13/2011

Raul would recommend this product to a friend

i always had a minor algae issue, but ever since i started using this gfo in my brs reactor 3 months ago i have zero algae problems. definately reccomend this

Awesome ProductBy Julianon 12/12/2011

Julian would recommend this product to a friend

Was in the midst of a serious new tank Diatoms explosion. A friend recommended this product to use in my reactor and within a few days my issues was lessening.

well worth the moneyBy davidon 12/8/2011

david would recommend this product to a friend

this has worked the best for me

A Great Value for High PerformanceBy Joe Macon 12/1/2011

Joe Mac would recommend this product to a friend

Like some other reviewers, I have used almost every brand of Granular Ferric Oxide (GFO) on the market over the years and BRS's Bulk GFO is undoubtedly the best for the price with very little sacrifice in performance. I give it 4 stars for performance because if you are willing to pay significantly more for other brands, they will perform very slightly better using the same amounts. I plan on purchasing BRS's High Capacity GFO when I run out of the "normal' capacity to compare. I anticipate that it will perform at or above that of the "premium" brands and the market (earning it 5 stars for performance), but costing approximately 33% more, will probably lower it's "value" score for me to 4 stars instead of this product's 5 (or even lower perhaps).

In my experience (15+ years at reef keeping), the use of GFO is way under promoted compared to its excellent utility. I have found it to be as fundamental for ensuring optimal conditions and parameters as are skimmers, calcium reactors (or kalkswasser/2 part solutions) or activated carbon (I know, I know... many don't use AC, but I'm a believer in its use also). Looking at the big picture, using GFO is one of the least expensive "costs" in being a continually successful reef keeper. It controls a vital parameter (PO4) that can cause devistation quickly and in low amounts.

An important caveat to remember is that many have observed deleterious effects by too quickly lowering high phosphate values, especially with SPS corals.

However, once you slowly get your PO4 to zero or near zero, consistent, continuous use of GFO will make your glass-cleaning magnet feel neglected!

I use BRS's GFO in a canister filter whose only other function is for pumping my aquarium's water through a chiller and holding small amounts of activated carbon. I keep both the GFO and carbon "sequestered" within the baskets of canister filter by using PURA Filtration Pads" (that I cut to fit with scissors) for the bottom and top most baskets. The canister filter also adds a little more water volume to the system.

The results of using BRS's GFO in this way have been outstanding. The only issue is that changing the media is a little tedious, so I'm very interested in trying out on BRS's "GFO Reactors", which appear to work under virtually the same principle, but should be much easier and quicker when it comes to changing out the media. If the price is right, the next review that you see from me may well be on one of those products (hint, hint BRS). ;)

From previous reviews here and on other sites, I am not quite sold on the "suspension-type" reactors due to the need for accurate flow adjustment (more maintenance) to keep the granules from either breaking each other up or from clumping too much). Although, clearly, their use would be far more efficient.

You will be impressed with this GFO.

GFO "Granular" Ferric Oxide By Virgilon 11/27/2011

Virgil would recommend this product to a friend

This item lowed my phosphates slowly as advertised. I will be buying it again to be used with my reactor. Don't forget there is a calculator on the site that tells you how much to add to your system.

Great to keep algae away!By Shaunon 11/24/2011

Shaun would recommend this product to a friend

I use the BRS RO/DI, reactor and this GFO i have no.. zero alge issues. for the money it is the best deal i could find. and its nice not having to worry about if it works or not. Piece of mind!

works greatBy Frankon 11/23/2011

Frank would recommend this product to a friend

works great. I had hair algae

ExcellentBy Roberton 11/23/2011

Robert would recommend this product to a friend

already seeing decrease in competing alge in my display

Works Great!By Bobbyon 11/22/2011

Bobby would recommend this product to a friend

I use the granular ferric oxide in my MRC reactor and this stuff tumbles really well. I found it to be better in my particular setup than the high capacity because I have the extra space in my reactor and it ends up being cheaper.

Great!By Jameson 11/14/2011

James would recommend this product to a friend

Great Value, works well. Make sure you flush well.

Awesome phosphate reducerBy Ericon 11/10/2011

Eric would recommend this product to a friend

I just ordered a gallon of this after trying it in my system. I was fighting cyno and since I added this it has disappeared. Great stuff good value a little dusty but that can be over looked

Great Stuff- easy to useBy MICHAELon 11/7/2011

MICHAEL would recommend this product to a friend

This GFO is a SUPER value compared to the competition. I've had nothing but good luck.

great productBy Aideon 11/3/2011

Aide would recommend this product to a friend

Great price on a wonderful product. This stuff dropped my phosphates to nothing. I highly recommend it

TestingBy Ja Nukenon 10/30/2011

Ja Nuken would recommend this product to a friend

Is this stuff Faked?

Great quality .. reduced my phosphates to zeroBy Scotton 10/29/2011

Scott would recommend this product to a friend

If you have phosphate problems this with the BRS reactor will solve your problem.

Good product By Anthonyon 10/26/2011

Anthony would recommend this product to a friend

I had a GHA outbreak and started using this GFO product in a reactor and within 1 week I noticved a huge improvement. After 2 weeks everything was gone. It is now part of my regular tank maitenance

AMAZING PRODUCTBy kyleon 10/26/2011

kyle would recommend this product to a friend

was battling diatoms, glass algae and gh algae frequently. bought a two little fishies reactor and this gfo. after one month the algae is gone and i am phosphate free! excellent product

GoodBy Danielon 10/25/2011

Daniel would recommend this product to a friend

For a reactor, i say this product it pretty good. But as far as the "Granular" type is concerned i WOULD NOT put it in a filter sock. I thought since it was a 200 micron sock id be fine, well as far as the media making its way back into the tank it was ok but i guess from the water beating on it, it turned my water a awful brown even though i had rinsed it prior to putting it in my tank. Stick to the pellets....

Great ProductBy Marcuson 10/24/2011

Marcus would recommend this product to a friend

This GFO lasts me approximately 3 months on my 220 gallon system. It keeps phosphates below .03 tested on a hanna meter. I would definitely recommend.

Quick and powerful, results showed with hoursBy Juanon 10/14/2011

Juan would recommend this product to a friend

Quick and powerful, results showed with hours started seeing a differencd

worked greatBy Johnon 10/13/2011

John would recommend this product to a friend

This product works great. I installed a BRS reactor and am using GFO "Granular" and within 48 hours reduced my phosphates greatly. I have found a great company in BRS, quick shipment as advertised. This company BFS and there products were recommended by an employee of a local aquarium store, he told me is the best he has seen and uses it at home, instead of what they sell.

Thanks BRS.

John

quality stuff for a great priceBy Jonathanon 10/12/2011

Jonathan would recommend this product to a friend

great gfo for a great price. i have a large tank and i have to use a lot of product. so for me there is no other choice out there.

It WorksBy Ryan on 10/12/2011

Ryan would recommend this product to a friend

It works the same as the rest for a fraction of the cost. I can change mine out monthly and not have to worry about the cost.

very goodBy chefrobsonon 10/10/2011

chefrobson would recommend this product to a friend

This product works better than most other products I have used in the past. The price is also almost half!

WorksBy Brianon 10/8/2011

Brian would recommend this product to a friend

helps out my tank a lot!

Works great!By Christinaon 10/7/2011

Christina would recommend this product to a friend

Used in a BRS reactor--this product works wonders to stop GHA!

Does what it saysBy Gregon 10/3/2011

Greg would recommend this product to a friend

After using this product for about a week month, my phosphates levels dropped to undetectable levels using the Hanna Checker. After about a month of using 1/2 cup of GFO in a BRS reactor for my 50gallon tank, the phosphate level started to raise - time to change replace. Product works as advertised. Using less product and getting better results than Phosguard.

Use this in your BRS GFO/Carbon ReactorBy Danon 9/29/2011

Dan would recommend this product to a friend

This stuff really works and if you adjust your reactor properly per BRS' instructions, you will have no problem with "fines" getting into your tank. Phosphates don't stand a chance against this media!

0 phosphates quickBy Donon 9/28/2011

Don would recommend this product to a friend

Love this product. High phospate reading of 1.2 and using this product in a reactor brought it to 0 in 2 days. Best used in a reactor using a slight tumble. Love buying it in bulk from BRS!

GFOBy AZreefon 9/25/2011

AZreef would recommend this product to a friend

Great price and value . I use it in My duel reactor and it works great . I get about a year out of a 2.5 # container . I use carbon every other Month in second chamber . Filter could have a larger diamater so it can hold the carbon down .

Works GreatBy Gregon 9/23/2011

Greg would recommend this product to a friend

Great product, great value. Works perfect for my 135 in the BRS reactor with a MJ1200. Definitely will continue to use this product.

Super DealBy Justinon 9/7/2011

Justin would recommend this product to a friend

Cant beat the price, hight quality GFO which I know is going to help keep my phos level down at 0 and make all my coral grow like weeds

Great productBy allen7_7on 9/7/2011

allen7_7 would recommend this product to a friend

Don't go without this product! Using this in the BRS dual reactor and couldn't be happier. Thanks BRS!!

0 ppm and LOVING ITBy Aaronon 9/7/2011

Aaron would recommend this product to a friend

Went from .22 to 0 ppm in a matter of days this stuff works! It can get stuck in the chamber ever once and a while. When it does I have to up the pressure to blow it around a bit so the tumble and restart, but I'm okay with this little step.

Great product, Great valueBy Smallblockon 8/27/2011

Smallblock would recommend this product to a friend

I bought this when I bought my brs dual reactor because money was tight. It lasted about 3 months, If I would have had the money I would have bought the 2 pound jug. It got me going and I saw a huge differance in the amount of algae on my glass. It works great and I'm hooked. If you want less phosphates and a cleaner glass and overall aquarium run this stuff from the best company in the biz.. Way to go BRS all your products are great and awesomely priced. I'm a loyal customer. BRS all the way baby!!!

Good GFOBy Andyon 8/25/2011

Andy would recommend this product to a friend

GFO is expensive to start with, but Bulkreefsupply is the best price I have found on the web. Very fine and tumbles easily. Works great to lower phosphate.

I Should Have Bought MoreBy Greyon 8/24/2011

Grey would recommend this product to a friend

So I bought the BRS GFO Reactor and MJ 1200 (don't get me started on that piece) and set everything up. As I was setting it all up, I had someone else test my Phosphate levels which were .39 ppm. That night, because it was a new test kit, I tried out the test kit myself and the levels were .19 ppm. I was sure then that the other person just didn't use the kit correctly because this isn't supposed to be an immediate cure or anything. The next morning I tested again and the phosphate levels are 0.00 ppm. This stuff is great. I should have bought more so I wouldn't have to come back a few months to replenish my supply.

Great ProductBy Bobon 8/23/2011

Bob would recommend this product to a friend

I used the HC in the BRS reactor in my 85 gal tank. Though it did take almost all my algae away it was hard to dial in the reactor with the HC. I was constantly having to dial it in. It could have been user error however i currently use the Precision Marine reverse reactor with the Granuller and it works great on my 185.

good value and performanceBy Christopheron 8/17/2011

Christopher would recommend this product to a friend

I've used other products and found for the price you can not go wrong with this gfo. This gfo helped solve my phosphate problem and dropped my levels to 0 almost overnight. Use it in a reactor which works really well.

Great!!!By Bryanon 8/11/2011

Bryan would recommend this product to a friend

I started using this product almost a year ago. Like many of us I started without using RODI I was using distilled water or Ozarka for topoffs and saltmix. Hair algae and Phosphates soon took their unwated presence. After using this in a Reactor and using the RODI unit from this site no more algae, or nasty CYNO

prefer the pellets over the granulesBy Leeon 8/10/2011

Lee would recommend this product to a friend

The granules need more care in controlling water flow and tumbing to prevent the agent from breaking down and entering the water stream. The pellets seem to be more mechanically stable for use in a reactor. Both products do a fine job in scrubbing PO4 from the system.

Better than other brands usedBy Mikeon 8/7/2011

Mike would recommend this product to a friend

I have used a couple other brands of GFO in the past. after a day or two, they tend to clump up. I have had no clumping with BRS GFO. Thanks for offering a superior product at a great value.

Just what I needed to get the job done!By Roberton 8/3/2011

Robert would recommend this product to a friend

There’s no comparison, GFO took out more phosphates in a 24 hour time frame than its aluminum oxide competitor.

wowBy jeremyon 8/1/2011

jeremy would recommend this product to a friend

dose the job very well

Save Money Buy BulkBy ReefJunkieon 7/19/2011

ReefJunkie would recommend this product to a friend

Great stuff at a good price. This GFO has low dust and tumbles quite nicely, all you have to do is tune your reactor till the output water is reading 0 P04 and your done.